Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

On Monday the 3rd of March, around 5pm UTC (9am PT) users may experience a brief period of downtime while one of our underlying services is under maintenance.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Lost my all sync data

  • 1 èsì
  • 1 ní ìṣòro yìí
  • 3 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ Chaython

more options

Hello Today I've installed Windows 11 and tried migrate my firefox data from old windows 10 to new windows 11 by online account, after login into my firefox account I've noticed all my bookmarks,tab,password,history etc gone. I don't understood why ... I never had problems like this before . when I logged and sync on another device I had all my data from firefox account... Could you please help me with that

Hello Today I've installed Windows 11 and tried migrate my firefox data from old windows 10 to new windows 11 by online account, after login into my firefox account I've noticed all my bookmarks,tab,password,history etc gone. I don't understood why ... I never had problems like this before . when I logged and sync on another device I had all my data from firefox account... Could you please help me with that

All Replies (1)

more options

Hey. As you said your sync is working on other devices. I recommend, uninstalling Firefox and reinstalling. Be sure during un-installation you purge the folders related to firefox. Most importantly the ones in your %appdata% folders. As that is where user data is stored. The syncing issue may be caused by existing user data in the directory. Also after a windows 11 upgrade, there's a hidden windows.old folder in root C:\ where data that could not be copied during upgrade is left.